Internal-combustion engine.



H. B. KElPiH.

lNTERNAL Comuslow ENGINE.

APPUICATIDN HLED MAY 29. |913- 1,263,563. Patented Apr. 23,1918.

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, munmmW/f H. B. KEIPER.

INTERNAL COMBUSTION ENGINE.

APPLICATION man mm 29. 1913.

1,263,563. Patented Apr. 23,1918.

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ax? ff UNT e 0 FZn, /Ln /J j a3 e ammitoz f improved valve mechanisms en rrnr) snATns PATENT onnron.

.i B. KEIPEB, 0F LANCASTER, PENNSYLVANIA.

INTERNAL-COMBUSTION ENGINE.

Application led May 29 jb all whom 'it' mw concern Be it known that I, HENRY B. K Errnn, e citizen of the United States, residing at Lancaster, in the county of Lancaster and Stute of Pennsylvania, have invented certain new und useful Improvements in: Internal-Combustion Engines; and I do hereby declare the following to be a. full, clear, and exact description of the invention, such as will enable others skilled in the art to which it :ippertnins to make and use the same.

This invention relates to internal combustion engines, und more particularly to for such engines and means for keeping the valves cool.

The primary object of the invention is to provide n simple, eiiicient, inexpensive and durable rotaryvalve for use with engines of.. the character referred to, adapted to operate quickly and noiselessly in opening and closing` the inlet and exhaust ports, for admitting the explosive mixture to the working cylinder and allowing the exhaust gases end Waste products of combustion to escape, and to prevent the accumulation of carbon on the valves and their seats and thereby prevent the disagreeable knocking sound und premature explosions which result from the deposit of carbon on the valves and valve seats and piston in the operation oi' internal combustion engines as heretofore constructed. Other objects are to provide nn improved valve mechanism to ether with simple andelicient means for adjusting und sustainin the vnlves in proper position and for ta ring up any wear.

The invention will be first hereinafter more 4particuls-irly described, with reference to the accompanying drawings, which are to he taken :is n part of this specleetion, und

then pointed out in the claims at the end of the description,`

In seid drnwingse-- Figure 'l represents a. plan view, purtly in section, of an internal combustion engine embodying my invention;

Fig. 2 is n vertical sectional elevation of the suine, n portion of the cylinder being broken away;

Specification of Letters Patent.

Patented Apr. 23, 1918.

. 1913. Serial No. 770,865.

Fig. 3 is n vertical sectional elevation of the cylinder-head or valve-casing; the section being taken on the line 3--3 of Fig. 1;

Fig. i is a horizontal sectional `view through the valve-casing showin a. modified form of valve mechanism with the rollers in the position in which they are shown in Fig. 2;

Fig. 5 is a. plan view illustrating the application of wearing rings to the valve, and

Figs. 6, 7 and 8 are detail cross-sections taken on line 6 6, 7--7 and 8 8, repectively of Fig. 5.

Referring to the drawings, in which the same reference letters are. used to note corresponding parts in different views, the letter A my denote the cylinder of en internal combustion engine in which a reci rocating piston is employed sind adapte to operate in the'usunl manner, said cylinder being provided with the usual water jacket or space for the circulation of water or other cooling medium, `and B may denote the cylinder-head or valve-casing' mounted thereon. To provide for the circulation of water or other cooling medium around the valves sented in said head or casing, the latter is provided with n water space extendingl around l'the vnlve at each end und in communication with the water jacket of the cylinder. The cylinder head o'r valveeasing B may be formed integrally with or secured upon the upper end of the cylinder by any suitable Ineens, and is formed or provided with parallel intersecting bores.l in whiclrarc sented ai pair of rollers C, C, euch having in its periphery a. recess or cut-away portion e which extends transversely thereof, or nt right angles to its axis, and is adapted to register with n corresponding recess in the periphery of the adj ncent roller so as to provide un opening between the rollers when said recesses are directly opposite each other for the admission of the explosive mixture or charge to the cylinder through the inlet port D, and also a recess c1 adapted to register with n corresponding recesss in the other roller so as to provide an cation with the exhaust D1 for the escape.

are `fitted in the parallel intersectin hores of the valve-casing and each may e rovided at one end with a, spur `gear mes' ing witha similar gear on the end of the other roller, so that whenone roller is revolved itwil-l impart motionxto the other roller and ceuse the twoto reyolve in opposite directions. One of said rollers may also be 'provided with a' reduced end portion or extension which rejects through a `stuffing box in -the cylinder head or valve-@asin and is provided with a suitable gear Whee such as `a .bevel gear E 'adapted toenga e a similarv ear wheel on a vertical sha t, journaled 1n brackets projecting from the cylinder andgeared to the crankshaft of t e engine, so that motion will be imparted to the rotary valve 'for opening and closing the inlet and exhaust ports alternately once during each revolution of the rollers constitutmgfsaid valve.l The 'rollers C, C, may be either solid or hollow, if desired, to permit. the circulation of a'ir or liquid therethrough in order'to keep. them cool; auf suitable umpin devicebeing used toe?- fect the esired circulation.

As will 'b'e seen, a 'water circulating space is provided around the working cylinder in communication with the water space which surroundsA the valve so that Water entering the eylinder'at X wlll pass around the same and up into the Water space offthe valvecasingaround the same and lover the valves at each end'of the casing and out at theexit X1, so as 'to revent undue heating of the valves. `For t e purpose of lubricating the valves. socketis provided in thevalve-casing for the attachment of an oil or grease cup,V from vwhich the lubricant' will pass throu h a duct'e to the periphery of one of the rlrs which is incontact with the peri lieryof the other roller so as to supply lu ricant'to the latter.

In 'Fig'. 4`of`the dravvin s l have shown a modification Iin which te' general construction and arrangement of'parts is substantially the same, als described with reference to Figs. 1 to 3,'except that the valve seats provided by the intersecting;y bores are I slight y tapering in form and the rollers are correspondingly tapered in order that any wear which vInlay result from long` and oontinuous use Inayle'talten up. To this end set screws F fitted in a yoke (l press against the ends of the rollers on which the inten meshing gears lare fixed and coiled or other suitable springs H are interposed between the roller ends and yoke so as to exert sufficient pressure to hold the valves lto their erteel simultaneously on both rollers.

seats and to automatically take up wear. For theA purpose ot' holding both rollers with the marginal portions of their registering recesses in exact alinement and to prevent end'wi'se inovement ot either roller independently of the other, the gear on one roller may-have eri heral flanges thereon between which this periphery ofy the other roller is confined so that any pressure tending to force either roller en dwise will be ex- The bracket or yoke G may also be provided with elongated slots to receive the fastening bolts g so as to permit a Very nice adjustment of the rollers, to take up `Wear andl the de- Seriet confession between the eues 'of the rollers permits such adfiustment to be made without throwing the marginal portion of the registeringV recesses on the peripheries of the I'Q 1ers out ofalinenient.

Tn Figs. 5 to "8 ofthe drawings l have illustrated 'the application of Weari'no rings to the valve lin which the rollers C. l, are provided with split rings e1, e1,'at their ends constructed preferably of`sprin'g steel adaptinv them to be sprung over the ends of the rollers into annul'ar grooves in Awhich they a're rtane'dl and 'with intermediate rrings e2, havng attened 4portions c3 'to adapt them to conform to the Shape'of the recessed ortins of 'tlie'roller's such rings bein' split obliquely, as shown, to ada' t them to e sprung over theends of the ro I ers und slipped into their places, `thus providing la wearing surface thal may be renewed from time to time by 'su,.,tituting new rings Afor those that are vvo'rn. y

The Aoperation vof, the in'ventioi will be readily understood from the foregoing description in connection with the accompanying drawings. 1n the position shown both 4the inlet and exhaust ports are closed1 the rol ers being in the position they 4occupy While the piston is moving upwardly for compressing th l charge; 'Both ports remain closed while the piston is making the full upward strokeand a` full downward or working stroke caused hyl the explosion which occurs at the endet' the first upward stroke ot the pistn. The recesses which communicate with lthe inlet 'port or conduit lea'dinfr from the source of supply of the explosive mixture will bc thrown into registeringpnsition or directly opposite each other,`openlng the inlet port for the admission of the explosive mlxture 'in'nnediately after the exhaust port closes,l and once during each revolution, while thc''registeriinil recesses which conminnicate with' the cx haust port' will.' he brought into registering position or directly'opposte each other also during cach revolution, but when the intake port closes a considerable interval of time elapscs hcforethe exhaust port is again opened, thus allowing time for the piston to move upward and back for compressing a charge and eecting an explosion before the exhaust port opens for the discharge of the exhaust ases and waste products of combustion w ich are expelled on the next upward movement of the piston, and on the next downward movement thereof the inlet port opens for the admission of another charge.

It will be understood,- of course, that various changes may be made in the details and arrangement of parts without departing from the s irit and scope of my invention. Any suitab e driving mechanism may be employed for impartingmotion tothe rotary valve either by means of a vertical driving shaft and gearing 4such as shown partly in full and dotted lines (Fig. l) or a belt or chain drive such as is well known in the art.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. ln an internal combustion engine, a rotary valve comprisin a pair ot' rollers. each having in its perip ery la plurality of recesses, one recess of each roller being adapted to register with a corres onding recess of the other roller to open t e inlet port once during each revolution of the rollers and then close the same, and other 'recesses of the two rollers being adapted tov register and open the exhaust port when the inlet port is closed.

2. In an internal. combustion engine, a rotary valve comprising two revolving rollers, each having a plurality of recesses in its periphery extending transversely of its axis,

periphery,

one recess being out of axial alinement with the other and the recesses of one roller adapted to register successively with corre sponding recesses in the other roller and alternately open and Vclose the inlet and cx: haust ports once during 'each revolution.

3. vIn an internal combustion engine, :l self-cleaning valve comprising a pair of rollersrevolubly fitted in intersecting bores of a cylinder-head or valve-casing, each of saidl rollers having a plurality of recesses in its one arranged out of axial alinement with the other, the recesses of one roller being adapted to register successively with those' of the other roller once during each' revolution to alternately open and close the inlet and exhaust ports.-

4. In an internal combustion engine, a valve-casing having intersecting bores to provide valve seats therein, and a v alve comprising -two oppositely rotating apering rollers fitted in said bores and each having a plurality of recesses therein, the recesses of one roller being adapted to register successively with corresponding recesses in the periphery of the other roller for opening the inlet and exhaust ports alternatelyI as the rollers revolve.

5. In combination, a valve-casing having intersecting bores to provide valve seats therein, and a valve comprisin two oppo sitely rotating tapering rollers ittecl in said bores and each having a plurality of recesses therein, the recesses of one roller being adapted to register successively with corresponding recesses in the` ptn-iphvry of the other roller for opening the inlet and ex haust ports alternately as the rollers rrvolve, and means for adjusting said rollers endwise to take up Wear.

6. In combination, a valve casing having intersecting bores to provide valve seats therein, and a. valve comprising two oppositely rotating tapering rollers fitted in said bores and each having a plurality of recesses therein, the recesses of one roller being adapted to register successively with corresponding recesses in the periphery of the other roller for opening the inlct and eX- haust ports alternately as the rollers revolve, and means arranged to exert a yield ing pressure tending to torce the rollers endivise to hold the registering recesses in alinement und automatically taire up wear.

7. lngin internal combustion engine a valve casing having intersecting bores, a valve comprising two oppositely rotating rollers in periphfmal contact seated in said bores and having registering 'eccssrs in their peripherics adapted to be orought succes sively into alinement with the inlet and ex haust ports to open said ports alternately as the rollers revolve, and :in oil duct leading to the periphery of one of said rollers for lubricating it and thereby lubricating the roller in peripheral Contact therewith.

8. A rotary valve comprising tivo rollers having recesses in their peripherics adapted to be brought into registering position o1' directly opposite each other to open the inlet and exhaust ports alternately as the rollers revolve; the ends of the rollers liasing split Wearing rings sprung into annular recesses therein and the intermediate portions thereof having split rings sprung thereon the latter rings havingliattened por tions fitting the recesses in the peripheries of the rollers.

9.1m combination with a ialve casing having intersecting bores, a rotary valve comprising a pair of rollers seated in said bores,I each roller having a plnraiity of recesses in its periphery arranged ont of axial alinement and adapted to register successively with corresponding recesses in the adjacent roller, gearing for rotating said rollv ers in opposite directions, and means for movin said rollers endwise in unison.

10. n 'an internal combustion engine, a rotary valve comprising a pair of revolnhle` Til 'iin

rollers each having ai plurality of recesses im its periphery arranged out o uxnl alinement, the recesses of one roller Vloeing adapted to register successively with correspondingly arranged recesses in the other roller to open and close alternately the intake und exhaust ports; said recesses being positioned on the perpheries of the rollers so that u considerable interval of time elupses between the HENRY B. KEIPER. Witnesses:

CHAs. E. LONG, B. FRANK Marum. 

